ABB RELION REX640, Техническое руководство, Страница: 1565 / 1960

The monitored data
CB_CL_BLKD
depends on the inputs
GCB_TEST
and
EXT_CHECK
,
and also on IED test mode as described in
Table 1518
.
CB_CL_BLKD
is available in the
Monitored data view.
Table 1518: Monitored data CB_CL_BLKD activation based on the inputs
IED test mode Inputs Monitored data
GCB_TEST EXT_CHECK CB_CL_BLKD
TRUE TRUE TRUE 1 (“Unblocked”)
FALSE FALSE
TRUE TRUE FALSE 2 (“Ext Check Fail”)
FALSE FALSE
TRUE FALSE N/A 3 (“IED Test CB Serv-
ice”)
FALSE TRUE N/A 4 (“IED Service CB
Test”)
The close CB condition is blocked if the
CB_CL_BLKD
status is 2(“Ext Check Fail”),
3(“IED Test CB Service”) or 4(“IED Service CB Test”).
In case for
BYPASS
input activation,
• If
GCB_TEST
is activated,
CLOSE_CB
is activated.
• If
GCB_TEST
is deactivated, and the bus and generator terminal voltages are both
live or one side live,
CLOSE_CB
is not activated.
Synchronization control
The general bus bar arrangement for a generator bus is shown in
Figure 857
.
The bus to which the generator is connected is determined based on the
circuit breaker and isolator position inputs (
GCB_OPEN
,
GCB_CLOSE
,
ISO_A_CLOSE
and
ISO_B_CLOSE
). The generator's bus connection status is shared with the
autosynchronizer co-ordinator function ASCGAPC as part of the
GEN_ASC_DATA
output.
Bus A
Gen CB
Bus B
G
Bus A
Gen CB
Single busbar arrangement Double busbar arrangement
ISO A
ISO B
ISO A
G
Figure 857: Different bus bar arrangements for a generator bus
1MRS759142 F Control functions
REX640
Technical Manual
1565